* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family:
    system-ui,
    -apple-system,
    "Segoe UI",
    Roboto,
    "Helvetica Neue",
    sans-serif;
}

body {
  background: #fce4ec;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  animation: bgPulse 18s ease-in-out infinite alternate;
  background: linear-gradient(145deg, #fce4ec 0%, #f3d0e6 40%, #e8c0e8 100%);
  background-size: 200% 200%;
}

@keyframes bgPulse {
  0% {
    background-position: 0% 20%;
  }
  50% {
    background-position: 100% 80%;
  }
  100% {
    background-position: 0% 20%;
  }
}

/* background image overlay with subtle parallax */
.bg-wrap {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.bg-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.1;
  transform: scale(1.1);
  animation: slowDrift 30s linear infinite alternate;
  filter: saturate(0.6) brightness(1.2);
}

@keyframes slowDrift {
  0% {
    transform: scale(1.1) translateX(-2%) translateY(-1%);
  }
  100% {
    transform: scale(1.2) translateX(2%) translateY(1%);
  }
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
  flex: 1;
  display: flex;
  flex-direction: column;
  position: relative;
  z-index: 2;
}

/* header / nav */
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0 12px;
  flex-wrap: wrap;
  border-bottom: 1px solid rgba(255, 220, 240, 0.658);
}

.logo {
  font-size: 1.8rem;
  font-weight: 600;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, #d48b9c, #b57eb5);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 4px 18px rgba(200, 130, 180, 0.2);
}

.nav-links {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  font-weight: 500;
}

.nav-links a {
  text-decoration: none;
  color: #3e2a3b;
  font-size: 1rem;
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
  transition: 0.25s ease;
  letter-spacing: 0.3px;
}

.nav-links a:hover {
  border-bottom-color: #b57eb5;
  color: #6a3f6a;
  transform: translateY(-1px);
}

/* sections */
section {
  padding: 50px 0 30px;
  scroll-margin-top: 30px;
}

/* banner */
.banner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  padding: 10px 0 20px;
}

.banner-text {
  flex: 1 1 280px;
}

.banner-text h1 {
  font-size: 3.2rem;
  font-weight: 700;
  line-height: 1.1;
  background: linear-gradient(135deg, #a05f8a, #c47da0);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 16px;
}

.banner-text p {
  font-size: 1.2rem;
  color: #2f1f2b;
  max-width: 520px;
  opacity: 0.8;
  font-weight: 350;
}

.banner-img {
  flex: 0 0 220px;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: all 0.3s ease;
  cursor: default;
  border-radius: 32px;
  box-shadow: 0 20px 40px -12px rgba(120, 60, 100, 0.3);
  transform: perspective(800px) rotateY(-2deg) rotateX(2deg);
  transition:
    transform 0.4s cubic-bezier(0.2, 0.9, 0.3, 1.1),
    box-shadow 0.3s;
}

.banner-img:hover {
  transform: perspective(800px) rotateY(4deg) rotateX(4deg) scale(1.02);
  box-shadow: 0 32px 60px -12px rgba(140, 70, 130, 0.4);
}

.banner-img img {
  width: 100%;
  height: auto;
  max-width: 220px;
  display: block;
  border-radius: 32px;
  border: 1px solid rgba(255, 220, 240, 0.4);
  background: #f3d0e6;
}

/* features & screenshot grid */
.features-grid,
.screens-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px 50px;
  margin-top: 20px;
}

.features-grid .feature-item {
  display: flex;
  flex-direction: column;
  padding: 18px 10px 10px 10px;
  border-radius: 28px;
  background: rgba(255, 245, 250, 0.4);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  box-shadow: 0 6px 18px rgba(190, 130, 170, 0.08);
  transition: 0.25s;
}

.features-grid .feature-item:hover {
  background: rgba(255, 240, 248, 0.7);
  backdrop-filter: blur(8px);
  box-shadow: 0 12px 28px rgba(160, 100, 150, 0.12);
}

.feature-item h3 {
  font-size: 1.4rem;
  font-weight: 600;
  color: #4f2b4a;
  margin-bottom: 8px;
}

.feature-item p {
  color: #2e1d2b;
  line-height: 1.6;
  opacity: 0.85;
  font-size: 0.98rem;
}

/* left-right交错布局: feature items alternate */
.features-grid .feature-item:nth-child(odd) {
  text-align: left;
  margin-right: 10px;
}

.features-grid .feature-item:nth-child(even) {
  text-align: right;
  margin-left: 10px;
}

.features-grid .feature-item:nth-child(even) h3 {
  color: #6f3d6a;
}

/* screenshots */
.screens-grid {
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 30px;
  justify-items: center;
}

.screen-card {
  background: rgba(255, 245, 248, 0.3);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  border-radius: 28px;
  padding: 12px 12px 16px;
  transition: 0.3s;
  box-shadow: 0 4px 14px rgba(150, 80, 130, 0.06);
  width: 100%;
  max-width: 200px;
}

.screen-card:hover {
  transform: translateY(-8px);
  background: rgba(255, 235, 245, 0.6);
  backdrop-filter: blur(6px);
  box-shadow: 0 18px 32px rgba(150, 80, 130, 0.12);
}

.screen-card img {
  width: 100%;
  height: auto;
  border-radius: 20px;
  display: block;
  border: 1px solid rgba(255, 220, 240, 0.3);
  background: #e6c8dc;
}

.screen-card p {
  margin-top: 10px;
  font-size: 0.85rem;
  font-weight: 450;
  text-align: center;
  color: #371f32;
  letter-spacing: 0.2px;
}

/* footer contact */
.footer {
  margin-top: 20px;
  padding: 40px 0 28px;
  border-top: 1px solid rgba(200, 150, 180, 0.2);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  text-align: center;
}

.footer a {
  color: #4b2d44;
  text-decoration: none;
  font-weight: 450;
  font-size: 1.1rem;
  transition: 0.2s;
  border-bottom: 1px dotted rgba(150, 80, 130, 0.2);
}

.footer a:hover {
  color: #7a4d72;
  border-bottom-color: #a06292;
}

.footer .copy {
  font-size: 0.9rem;
  color: #4d3346;
  opacity: 0.7;
  letter-spacing: 0.5px;
  margin-top: 6px;
}

/* responsive */
@media (max-width: 780px) {
  .banner {
    flex-direction: column-reverse;
    text-align: center;
  }
  .banner-text p {
    max-width: 100%;
  }
  .banner-img {
    flex: 0 0 180px;
  }
  .banner-img img {
    max-width: 180px;
  }
  .features-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .features-grid .feature-item:nth-child(odd),
  .features-grid .feature-item:nth-child(even) {
    text-align: left;
    margin: 0;
  }
  .screens-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .nav-links {
    gap: 1.2rem;
    justify-content: center;
    margin-top: 8px;
    width: 100%;
  }
  .logo {
    font-size: 1.6rem;
  }
  nav {
    flex-direction: column;
    align-items: center;
  }
}

@media (max-width: 460px) {
  .screens-grid {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
  .banner-text h1 {
    font-size: 2.5rem;
  }
  .container {
    padding: 0 16px;
  }
}

/* extra polish */
.section-title {
  font-size: 2rem;
  font-weight: 600;
  color: #3f263a;
  margin-bottom: 10px;
  letter-spacing: -0.3px;
  background: linear-gradient(135deg, #774a6e, #a76b96);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: inline-block;
}

.section-sub {
  color: #392a35;
  opacity: 0.6;
  font-weight: 350;
  margin-bottom: 20px;
}

hr {
  border: 0.5px solid rgba(200, 150, 180, 0.15);
  margin: 6px 0;
}